FKIE_CVE-2026-52965

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure When ttm_tt_swapout() fails, the current code calls ttm_resource_add_bulk_move() followed by ttm_resource_move_to_lru_tail() to restore the resource's bulk_move membership. However, ttm_resource_move_to_lru_tail() places the resource at the tail of the LRU list which, relative to the walk cursor's hitch node (placed immediately after the resource when it was yielded), puts the resource *in front of the* the hitch. The next list_for_each_entry_continue() from the hitch finds the same resource again, causing an infinite loop. Fix by deferring del_bulk_move to the success path only. On the success path, TTM_TT_FLAG_SWAPPED has just been set by ttm_tt_swapout() but the resource is still tracked in the bulk_move range, so ttm_resource_del_bulk_move()'s !ttm_resource_unevictable() guard would incorrectly skip the removal. Introduce ttm_resource_del_bulk_move_unevictable() which bypasses that guard.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0124a09e3e5f5f6080efe9663b27af27933f8382
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b2ed01e7ad3de80333e9b962a44024b094bc0b2b
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/ttm/ttm_bo.c",
            "drivers/gpu/drm/ttm/ttm_resource.c",
            "include/drm/ttm/ttm_resource.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0124a09e3e5f5f6080efe9663b27af27933f8382",
              "status": "affected",
              "version": "fc5d96670eb2540d2572a14351e82ffe45d5ac11",
              "versionType": "git"
            },
            {
              "lessThan": "b2ed01e7ad3de80333e9b962a44024b094bc0b2b",
              "status": "affected",
              "version": "fc5d96670eb2540d2572a14351e82ffe45d5ac11",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/ttm/ttm_bo.c",
            "drivers/gpu/drm/ttm/ttm_resource.c",
            "include/drm/ttm/ttm_resource.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure\n\nWhen ttm_tt_swapout() fails, the current code calls\nttm_resource_add_bulk_move() followed by ttm_resource_move_to_lru_tail()\nto restore the resource\u0027s bulk_move membership.\n\nHowever, ttm_resource_move_to_lru_tail() places the resource at the tail\nof the LRU list which, relative to the walk cursor\u0027s hitch node (placed\nimmediately after the resource when it was yielded), puts the resource\n*in front of the* the hitch. The next list_for_each_entry_continue() from\nthe hitch finds the same resource again, causing an infinite loop.\n\nFix by deferring del_bulk_move to the success path only.\n\nOn the success path, TTM_TT_FLAG_SWAPPED has just been set by\nttm_tt_swapout() but the resource is still tracked in the bulk_move range,\nso ttm_resource_del_bulk_move()\u0027s !ttm_resource_unevictable() guard would\nincorrectly skip the removal. Introduce\nttm_resource_del_bulk_move_unevictable() which bypasses that guard."
    }
  ],
  "id": "CVE-2026-52965",
  "lastModified": "2026-06-24T17:17:06.937",
  "metrics": {},
  "published": "2026-06-24T17:17:06.937",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0124a09e3e5f5f6080efe9663b27af27933f8382"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b2ed01e7ad3de80333e9b962a44024b094bc0b2b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.